package pers.aidenj.ostrich.common;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class VerificationCode {
	private static Color getRandColor(int fc, int bc) {
		Random random = new Random();
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}

	public static void getRandImg(HttpServletRequest request,
			HttpServletResponse response) {
		response.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-Control", "no-cache");
		response.setDateHeader("Expires", 0);

		int i_width = 60;
		int i_height = 20;
		BufferedImage image = new BufferedImage(i_width, i_height,
				BufferedImage.TYPE_INT_RGB);

		Graphics g = image.getGraphics();
		Random random = new Random();

		// g.setColor(getRandColor(200,250));
		g.fillRect(0, 0, i_width, i_height);
		g.setFont(new Font(null, Font.PLAIN, 18));

		g.setColor(getRandColor(160, 200));

		for (int i = 0; i < 155; i++) {
			int i_x = random.nextInt(i_width);
			int i_y = random.nextInt(i_height);
			int i_x1 = random.nextInt(12);
			int i_y1 = random.nextInt(12);
			g.drawLine(i_x, i_y, i_x + i_x1, i_y + i_y1);
		}

		String s_Rand = "";
		for (int i = 0; i < 4; i++) {
			String rand = String.valueOf(random.nextInt(10));
			s_Rand += rand;

			g.setColor(new Color(20 + random.nextInt(110), 20 + random
					.nextInt(110), 20 + random.nextInt(110)));
			g.drawString(rand, 13 * i + 6, 16);
		}
		

		request.getSession().setAttribute(request.getParameter("uuid"), s_Rand);
		g.dispose();

		try {
			ImageIO.write(image, "JPEG", response.getOutputStream());
			response.getOutputStream().close();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				response.getOutputStream().close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

	}
}
